Amazon's CFO, Brian Olsavsky, told investors in a Thursday earnings call that the online retail giant would spend $800 million on this new initiative in the coming quarter.

"We're currently working on evolving our Prime shipping program, which has historically been a two-day program, to a one-day shipping program," a company spokesperson told Business Insider. "Customers may already notice more one-day options on our site. In fact, we have significantly expanded our selection and eligible zip codes in the past month and we aren't done."

But some online are reacting to the news with uncertainty and skepticism. Business Insider scoured the web to get a better sense of what consumers think of Amazon's new strategy.

Numerous comments indicated that some people already received Prime orders within a day.

"I've been getting a lot of one day shipping and it shocks me every time," one commenter wrote on Facebook. "Pretty cool! I just hope they don't make us pay an extra fifty bucks for this."

An Amazon spokesperson told Business Insider on Tuesday, one day after this post was originally published, that the online retailer has offered "faster than two day shipping" options for several years.

"We will continue to offer same day and Prime Now selection, but this is about offering more of our selection with free one-day shipping as the default, rather than free two-day shipping," the spokesperson said.

"Our Q2 guidance reflects approximately $800 million in incremental spend related to this investment. We've taken a significant step, and it will take some time to achieve. We want to ensure a good delivery experience for customers as we evolve this offer."

But not everyone reacted to the news so positively. Some expressed worries about whether this move would prompt Amazon to increase the cost of Prime subscriptions.

"We are not raising the price of Prime at this time and do not have any plans to share," an Amazon spokesperson told Business Insider.

"And the annual cost of a Prime membership will rise to ... how much?" one Facebook user wrote, while someone on Reddit wrote, "I don't want to have to start paying more because of this."

Still others voiced doubts about whether Amazon's supercharged delivery standards would even affect them. At least two Facebook users wrote that they wished Amazon would instead invest in improving two-day Prime shipping in certain areas.

"Seriously?" one commenter wrote. "A third of the time they can't even get my packages to me in two days. Sometimes my Prime packages take five days or they get lost and don't show up at all."

Commenters also brought up a few recent controversies involving Amazon.

"Please stop," one poster tweeted, linking to an article about unions raising concerns about the impact the one-day shipping initiative would have on warehouse workers. "Humanity doesn't need this."

Another Facebook user brought up the company's tax practices: "Perhaps they could use the money to pay federal income tax to support the country at large. Just a thought."